Viewers -The number of total viewers age 2+ (in millions) watching the program.A18-49 -Percentage of US TV-owning adults 18-49 watching the program.Share -Percentage of US TV-watching adults 18-49 watching the program.Lead - Adults 18-49 rating of the show's lead-in (last half hour).True - A metric that adjusts the A18-49 rating for overall viewing levels, competition and lead-in.Sitch - The percent difference between True and 18-49 rating, or a measure of how easy or difficult a given show's timeslot is.Skew - Percentage of adults 18-49 within the show's total viewership.y2y - Difference between the season-to-date A18-49 average and the A18-49 average from one year ago through the same number of episodes.A18-49+ - The season-to-date adults 18-49 average compared with the season-to-date average for all original non-scripted series on the big four networks.